Pen



FIG. 1 is a top plan view of the pen showing my new design;

FIG. 2 is a left side view thereof, the right side view being a mirror image of the left side view;

FIG. 3 is a front view thereof;

FIG. 4 is a view thereof rotated 45° from the view shown in FIG. 3;

FIG. 5 is a back view thereof; and,

FIG. 6 is a view thereof with the cap removed from the end and placed over the nib in closed position.

The broken lines showing the nib in FIGS. 2 to 5 are included to show a portion of the pen that forms no part of the claimed design. 

CLAIM The ornamental design for a pen, as shown and described. 